Traction-wheel.



N. CAMPBELL.

v TRACTION WHEEL. APPLICATION FILED APR. 1a. 1908.

- Patented July 20, 1909.

amoawto z WWI named ilttom wi l,

UNITED sTATES natrnn'r OFFICE.

NEWTON cAMrBELL,

OF ELIZABETHTOWN, OHIO, ASSIGNOR OF ONE-FOURTH TO HARRY J.

SYKES AND ONE-FOURTH TO JOSEPH W. HAYES, OF ELIZABETHTOWN, OHIO, ANDONE- FOURTH TO GEORGE H; WILSON, OF OLEVES, OHIO. v

TRACTION-W'1EEL.

To all whom-it may concern:

Be it known that I, NEWTON CAMPBELL, a citizen of the United States,residing near Elizabethtown, in the county of Hamilton and State ofOhio,-have invented a new and useful Traction-Wheel, of'which thefollowing is a specification. I

The present invention relates to wheels for automobile or other roadvehicles, and the primary object is to provide a simple and I practicalstructure that is very durable, will prevent slip ing and skidding ofthe wheels, and is intenclbd to take place of the expensive rubber tiredwheels now in general use.

The preferredembodiment-of the invention is illustrated in theaccompanying drawings, wherein Figure 1 is a vlew partly in el evationand part1 in section of a portion of the improved whee. Fig. 2 is a lanview ofL-the same.

Fig. 3 is a crossv sectional view. Fig..j4 is ,a 1'

- riaL, It will be noted that the calks, as well detail perspective viewof one of the-calks.

Similar reference characters designate corresponding 'parts in all theffigures of' the drawings.

In the embodiment illustrated, the wheel as usual, comprises a hub fromwhich radi-' ate spokes 5, said spokes being fixed at their outer endsto or in a rim A web 6 having a pair of concentrically-disposed flanges7 and 7* projecting from opp'osite sides thereof, the outer flanges 7being and between adjacent ribs are formed chambers or sockets 8 whichare wholly open at the sides of the rim. The ribs or partitions 7 on oneside of the wheel are staggered with-respect to those on the oppositeside, so that thereby the chambers 8 on one side will be staggered withrelation to those on the other side. The inner and outerwalls of eachchamber 8 are provided with apertures which extend entireb through. the

Specification of Letters Patent. Application filed April 18, 1908.Serial No. 427,865,

The spokesv may be of any structure and of any material, but the rim Aisof metal, preferably steel.. The rim A is formed with a central ring or'Patented July 20, 1909.

flan es 7 and 7 ferthe' rece tion of ri in de'vi ces in the form ofcalks g pp g i paced rows of separate calks 9, radiall disposed, projectfrom the rim of the wheel, an are preferably elongated or elliptical incross section. These calks are slidably mounted in the rim, and haveshanks 10,

which slidably pass through the sockets 8 and project beyond the innersides of'the flanges 7, the projecting portions beingthreaded, asillustrated at 11. The calks are urged outwardly by coiled springs 12locatedin the-"sockets, the inner ends of the springs bearing againstthe inner walls of said'sockets, the outer ends bearing against theheads of the calks. The outward movement of said calks is limited bynuts or other stops 13 mounted on the inner ends of the shanks, andinterposed between the nuts and the flanges are buffers 14 comprisingwashersof rubber or other yielding mate- 'as the sockets are disposedin' staggered relation. With this construction, the projectingl calkswill engage the roadway, particulary if the same is soft, because ofsand, mud or the like, and thus the wheels will not slip nor skid.'Where a hard roadway is encountered, or if the wheel should pass over astone' or obstruction, the calks will be forced inwardly againsttheaction of the springs, thus preventing 'arsorshocks. Inasmuch as thetread of t e'wheel, including the rim and the calks is of hard metal,such as steel, it will be evident that the same will wear for a verygreat length oi time, and

' should a calk become unduly worn or broken,

it can be removed and replaced by a new one with ease and expedition.The cushions or buflers 14' are important, inasmuch as they eflectivelyserve to prevent the noise that would otherwise occur from the nutsstriking the flan es. v

- It will be noted that the heads of the 'calks as used by me areelliptical and that the heads are so turned that their longer diametersare parallel with the rimfof the wheel. This ives a very much bettertread surface tl 'lail if the calk were round headed, and the ellipticalhead makes a much better engagement with the road surface than would around head, or an elliptical head having its longer diameter turnedtransversely 'to the wheel Callas so constructed and arranged wearbetter, and, as before 'remarked, engage more firmly with the round.

,In' connectmnwith an elliptical ca k, the.

' stood that various changes in the size, shape,

proportion, and minor details of construction, may be resorted towithout departing from the spirit or sacrificing any of the advantagesof the invention. l

Having thus fully described my invention what I claim as new, and desireto secure by Letters Patent, is: Y

1 A wheel rim comprising a central an' nular ring or web, a pair ofspaced concentrically-arranged flanges projecting from opposite sides.of the said web and integrally connected therewith, the outer flangesbeing flush with the periphery of the web to forms. tread facetherewlth, radially-disposed ribsbetween each pair of flanges andintegrally connected therewith and with the web and forming'with theflanges spaced chambers open at the sides of the rim, the inner andouter walls of each chamber having alined apertures for receivingsurface' engaging members.

2. Awheel rim comprising a central annu-- lar ring or web, a pair ofspaced concentrically-arranged flanges projecting from opposite sides ofthe said web and integrally connected therewith, the outer flanges being,flush with theperiphery of the web to'form a treadface therewith,radially-disposed ribs betweeneach pair 'of flanges and forming with theflanges s aced chambers open-at the sides of the rim, t e inner andouterwalls of each chamber having alining apertures forreceivingsurface-engaging members, ra-

dially-disposed surface-engagin members extending radially of the rim aneach comprising. a single-piece element of such length as to extendoutwardly and inwardly from the outer and inner flanges, springsarranged in the said chambers for yie dmg y hOldlIl the members} withtheir outer ends projected from the tread of the wheel,'and stops on theinner ends of the members arranged to engage the inner flange to limitthe projecting movement of themembers.

lar web, a pair of concentric flanges extending from opposite sides ofthe. web, the outer -flange being flush with the periphery of the weband .the inner flangebein spaced outwardly from theinner edge 0 the webto form an annularinternal r1b extending around the rim, spokesconnected with the said rib, radial-connecting ribs or partitionsbetween each 'pair of annular flanges, the connectinribs of one side ofthe-nmbeing staggers with respect-to those on the opposite sides andforming chambers in the'sides' of the rim,

each" chamber Kevin aperturesin itsinner and outer walls, ra1ally-d1sposed -surfaceengaging -members extending throughthe chambersand said members from the rim of the wheel in a radial direction, aspring in each chamber and encircling the member therein for urging thelatter outwardly, said spring-hem removable laterally fro'm its csurface-enga 'ng member, and devices'on th ided in theaid apertures,

inner ends 0 the said members engaging the inner flanges of the .rim forlimiting the outward movement of the members.

In testimony thatI claim the foregoing as my own, I have-hereto aflixedmy signature in the presence of two witnesses.

NEWTON CAMPBELL.

' 'Witnesses:

Gno. O COLUMBIA,

- WARREN TEBBS.

eing remcva 1e outwardly amber a ter removal of its 60- 3. A wheel rimcomprising a central annu-

